Phantom

Stereo Preamplifier

With the Phantom Preamplifier, musicians appear silhouetted by the air about them, filling the room with a mesmerizing depiction of the recording. Music emanates from an expanse that outlines the recording venue, transporting you to the moment of creation. Coupling advanced technologies and inspired design, the Phantom preamplifier elevates preamplifier performance to an art form.

 

The Phantom preamplifier is the first Krell preamplifier to include an optional crossover. The crossover functionality offers the ability to use a subwoofer/satellite speaker arrangement and still maintain the highest quality sonic performance. Previous to the Phantom preamplifier, this system configuration would require signals to pass through a subwoofer's lower quality crossover circuitry. The Phantom preamplifier is the centerpiece of a world class audio system where space is at a premium.

Crossover Highlights

 

Owing to Krell's work in the Modulari Duo Reference loudspeaker, the unique crossover feature is a highly sophisticated option. When the optional board is present, additional crossover menu items become available. Definable parameters include independently assignable crossover frequencies and filter types for the high and low pass sections. Choices include 40Hz, 55Hz, 75Hz, and 100Hz crossover points with 12dB, 24dB, and 48dB Butterworth or 24dB Linkwitz-Riley style filters. The high pass section of the crossover uses the full Phantom preamplifier circuitry for its output stage.

 

Circuitry Highlights

 

The Phantom preamplifier is a dual monaural circuit design with the left and right channels afforded their own power supply regulation and individual full chassis sized boards. All signal gain is realized in surface mount topology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs 1.5 MHz open loop bandwidth in a zero feedback, balanced, Krell Current Mode design terminating in Krell CAST. A complete Krell system (source, preamp, and amplifier) system, connected using CAST interconnects reduces the number of voltage gain stages to the minimum, one. The resulting noise floor approaches the theoretical limit of technology. Negative feedback is not used anywhere in the preamp, nor is it necessary. Open-loop distortion is typically less than 0.003%. The volume control is realized with a balanced resistor ladder - bandwidth and transient response of the preamp circuitry are virtually unaffected by the volume setting.

 

Power Supply Highlights

 

The Phantom audio circuits receive power from a Krell Current Mode analog power supply housed in its own dedicated chassis. The power supply avoids the common integrated circuit topology used in many preamplifiers and instead mimics the design topology of Krell Evolution e Series amplifiers. The circuitry is completely discrete giving it the ability to respond quickly to current demands and also be unaffected by all but the most severe AC voltage power fluctuations. Oversized for a preamplifier, the power supply features a 290 VA transformer and 41,600μF of capacitance. Locating the power supply in its own chassis presents the ideal configuration for isolating stray electrical and magnetic interference from the critical preamplifier signal path. Capable of delivering current and voltage swing for any musical event, the Phantom power supply is gentle on AC requirements when not in use. A new eco-friendly design reduces standby power draw to 2W.

 

The Phantom preamplifier is offered in diamond-cut silver or a luxurious black finish.

Phantom II

Stereo Preamplifier

The Phantom II incorporates the advanced technologies and brilliant design of the Phantom preamplifier into a single chassis format. Often overlooked, the preamplifier is a critical component in the signal chain. A small signal must be carefully amplified without damaging the ephemeral staging and dimensional components of the music. Heard through the Phantom II, music fills a listening room with three dimensional imaging, tonal integrity, and staggering dynamics.

 

The Phantom II is the perfect companion for the Evolution 302e power amplifier and Cipher SACD/CD player.

Circuitry Highlights

 

Sharing the same audio circuitry as its bigger brother, the Phantom II preamplifier is a dual monaural circuit design with the left and right channels afforded their own power supply regulation and individual full chassis sized boards. All signal gain is realized in surface mount topology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs 1.5 MHz open loop bandwidth in a zero feedback, balanced, Krell Current Mode design terminating in Krell CAST. A complete Krell system (source, preamp, and amplifier) system, connected using CAST interconnects reduces the number of voltage gain stages to the minimum, one. The resulting noise floor approaches the theoretical limit of technology. Negative feedback is not used anywhere in he preamp, nor is it necessary. Open-loop distortion is typically less than 0.003%. The volume control is realized with a balanced resistor ladder - bandwidth and transient response of the preamp circuitry are virtually unaffected by the volume setting.

 

Power Supply Highlights

 

The Phantom II audio circuits receive power from a Krell Current Mode analog power supply. The power supply avoids the common integrated circuit topology used in many preamplifiers and instead mimics the design topology of Krell Evolution e Series amplifiers. The circuitry is completely discrete giving it the ability to respond quickly to current demands and also be unaffected by AC voltage power fluctuations. Oversized for a preamplifier, the power supply features a 140 VA transformer and 35,000μF of capacitance.

 

The Phantom II preamplifier is offered in diamond-cut silver or a luxurious black finish.

Phantom III

Stereo Preamplifier

The Phantom III is the first Krell preamplifier to include either an optional digital input module or a headphone output. The digital module features AES/EBU, coaxial, and optical digital inputs for use with streaming devices or other digital sources.

 

The Phantom III is the perfect centerpiece for a world class digital and analog audio system.

Circuitry Highlights

 

The Phantom preamplifier is a dual monaural design with the left and right channels afforded their own power supply regulation and individual circuit boards. All signal gain is executed with surface mount technology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Featuring 700 kHz bandwidth in a zero feedback, balanced, Krell Current Mode design, the Phantom III shares the same design philosophy as its bigger brother, the flagship Phantom preamplifier. Negative feedback is not used anywhere in the preamp, nor is it necessary. Open-loop distortion is typically less than 0.003%. The volume control is realized with a balanced resistor ladder - bandwidth and transient response of the preamp circuitry are virtually unaffected by the volume setting. The headphone circuitry is identical to the main circuitry, offering private listening with the same performance as speaker playback.

 

Digital Module Highlights

 

The digital module supports up to 24 bit/192kHz LPCM. All digital signals are fed to an ESS Sabre DAC and then sent to Krell's Current Mode, discrete, balanced analog circuitry. Being a modular design, the optional digital converter module is easily added at any time.

 

Power Supply Highlights

 

Oversized for a preamplifier, the power supply features a 95 VA transformer and 40,000μF of capacitance giving it the ability to respond quickly to musical demands. The large power supply improves noise rejection and renders the Phantom III impervious to all but the most severe AC voltage power fluctuations. A new eco-friendly standby mode reduces power consumption to 2W

 

The Phantom III preamplifier is available in silver or black finish.